When in doubt, make it stout

[Dennis T.]

Shear Strength,


The snow conditions are ideal for blowing; Yet I'm breaking off shear bolts. I'm switching from the factory recomended Grade 5 bolts I'm now running which have 3 marks or lines on the head that are in the shape of a “Y”. To Grade 8 bolts that have 6 marks on the head and greater shear strength.
I've done this many times before in other blower types I've owned with no problem.

http://www.rockcrawler.com/techreports/fasteners/index.asp
“When in doubt, make it stout!”

 

[Iowan]

The only problem with that MR.T, is the next thing to break is the gearbox on the blower. Ive done it on my Snapper after I broke all my spare shear pins, but there is a risk.

 

[Wild and Free]

I have replaced all the 5/16" and 3/8" butter bolts with grade 8 harware on my Jinma as well.

Went from replacing about 3-4 each time I cleared snow to maybe once per snow event now.